Electrical water-heater.



R. R, LOCKHART.

ELECTRICAL WATER HEATER. PPLIo'ATIN FILED MAY ze, 191s.

lPatented Mar. 31, 1914.

posed innerI plates having theirlower ends UNITED STATES PTENT oFFIoE.

ROBERT ROY LOCKHART, OF WINNIPEG, MANITOBA, CANADA.

' ELECTRICAL WATER-HEATER.

pipes supplied on range boilers and provided with feed wires fitted witha plug which can be readily screwed into a socket supplied for thepurpose, the socket being connected in a suitable electric circuit.

l With the above objects in view the invention consists essentially in acylindrlcal open ended casing,l a contracted coupling iece screwthreaded onto the upper end o the casing, a T-coupling piece screwthreaded on the lower end of the casing, a screw threaded plug closingthe lower end ofthe T-coupling piece', a specially designed andconstructed heating element carried by the plug and feed wires connectedwith the heating element, the parts being arrangedl and constructedas-hereinafter more particularly described and later pointed out in theappended claim.

Figure 1 represents a side view of the device as it appearsin use, partsbeing broken away to expose construction. Fig. 2*.represents anvenlarged detailed vertical sectional Vview through the heater. Fig. 3represents a. horizontal sectional 4view through the heater. Fig. 4 is a-plan view of the' upper end of the heating element.

In the drawing like characters of reference indicate corresponding partsin each figure.

Y 1 represents an open ended cylindrical casing having the ends thereofscrew threaded to receive a contracted coupling piece 2 and a T-shapedcoupling piece 3.

4 is a lplug screw threaded into the lower end of t e coupling piece 3and closing. the same. The plug is supplied with an inwardly directedflange 5 which supports an insulating disk 6 on which is mounted theheating element 7. The heating element is now described in detail.

8 and 8 are two similar vertically dis- Specication of Letters *PatentPatented M31-, 31, 1914, Application led May 28, '1913. Se'al No.770,359.

connected by a base piece 9, which base piece f rests onV the disk 6 andis held permanently to the plug by a ring 10 which is screw threadedinto the upper end of the plug and 1s designed to jam the base piece anddisk tightly against the flange 5. The plates 8 and 8 are connected by aseries of staggered spaced tubes 11 having their ends opening to theouter sides of the plates.

12 representsA a resistance coil of wire heavily insulated withanasbestos or suchl like coating `13 which insulated wire is woundbackwardly and forwardly through the tubes on the left hand side, thenacross and backwardly' alternately through the tubes on the right handside. The ends of the coil 12 'are passed through the base 9 and alsothe `disk 6 and are connected with feed wires' 14 and 15. The wires passdownwardly through asuitable insulating ferrule 16 carried by the plugand are connected to a further electrical screw plug 17. The protrudingportions of the 4coil ,appearing on the outer faces ofthe plates 8 and8' are inclosed by arched outer plates 18 and 19 having their edgessuitably fastened to the edges of the plates 8 and 8. The upper ends ofthe plates 8 and 8 19 are closed over by cap plates 20 and 21. v

The above completes the description of the heating element which it willbe noticed fits snugly within the casing 1.

22 represents a range boiler mounted on a suitable pedestal 23 andsuppliedv with the usual-feed water pipe 24 and service pipe 25.

26 and` 27 represent the usual inlet and outlet heating pipes providedon a range boiler. Thev pi e 26 is `connected through a suitable elbowg8 with a pipe 29 having the lower end thereof screw threaded into thecontracted upper end of the coupling piece 2 of the heater. The pipe 27is connected through a suitable elbow 30 with a pipe 31 screw threadedinto the coupling piece 3.

Whenone desires-to heat the water in thel range boiler he simplyconnects the plug 17 with an electrical receiving socket supplied forthe purpose it being understood that` the socket is contained within asuitable electrical circuit. When the connection is made ilo casingthrough the pipes 27 and 31. When y circuit containing the coil sobroken.

the Water in the boiler has been heated suficiently the screw plug isdetached and the It will be seen that a very eective heater is providedas lthe Water passing into the casing through the pipe 31 comes incontact with a large heating surface ,as it is forced to pass betweenthe tubes which appear practically throughout the full length of thecasing.

What I claim as lny invention is The combination comprising acylindrical casing, a contracted coupling piece secured to one end ofthe casing and provided with an outlet opening, a second coupling piecef secured to the opposite end of the casing and and provided with aplurality of spaced.

staggered radiatin tubes and. feed Wires connected electrical y with theelement, said feed Wires extending through said tubes and alternatelyentering and leaving opposite ends thereof, as and for the purposespecified. Signed at Winnipegthis() day of April, 1913.

ROBERT ROY LOCKHART. In the presence of- G. S. ROXBURGH, R. FOSTER.

